Dolphin Sutures

Quality & Testing

Quality is a process,
not a claim

A suture is a implant that has to behave the same way in the 500th box as in the first. This is the chain that holds it there — where the yarn and monofilament come from, what they are tested against, and what is checked before a batch is released.

USP / EP

Pharmacopoeia standards applied

11

Biological safety endpoints tested

Class 10,000

Cleanroom manufacturing

In-house

QC laboratory & ETO sterilization

The chain

Seven controls, in order

Each step is designed to catch a different failure, and none of them is outsourced. That is the point of doing testing and sterilization on site: a deviation is found by the people who can stop the line.

  1. A coating assay under way in the Dolphin Sutures quality control laboratory 01
    Coating

    Braided strands are coated, and the coating is assayed in our own laboratory rather than taken on trust.

  2. A needle being swaged onto a suture strand on a crimping press 02
    Needle attachment

    Every needle is swaged to its strand under set conditions. The join is the point of this step, and it is pull-tested further down the chain.

  3. A suture being wound onto a card before packing 03
    Winding & packing

    Wound onto cards and sealed into the primary pack. Handling ends here; everything after this happens through the packaging.

  4. Operators loading catgut sutures for ethylene-oxide sterilization 04
    Validated sterilization

    In-house ethylene-oxide sterilizers running validated cycles, with residuals checked against limits before release.

  5. A suture strand under tension between the grips of a tensile testing machine 05
    Strength & gauge

    Diameter is held to USP and metric limits, and strands are pulled against the pharmacopoeia minimum, batch by batch.

  6. A curved needle held in a test fixture measuring attachment strength 06
    Needle pull-out

    The force needed to separate needle from strand is measured on every batch, against the same standards.

  7. Sterility test samples being loaded into an incubator 07
    Sterility

    Samples from each sterilized lot are cultured before the lot is released, and stability studies set the shelf life printed on the pack.

Biological safety

Eleven endpoints, before a material is used

Biological evaluation asks one question — what does this material do when it meets tissue — and answers it from eleven directions. Each row below says what the assay screens for.

Certification is the evidence, not the argument: our CE, ISO 13485 and WHO-GMP certificates are the audited proof that these systems, practices and records are in place. The certificates themselves are published.

Endpoint What it screens for
Cytotoxicity Whether the material or its extracts damage cells in culture.
Sensitization Whether repeated contact provokes an allergic response.
Irritation / intracutaneous Whether the material irritates tissue on contact.
Acute systemic toxicity Effects from a single, short-term exposure.
Subchronic toxicity Effects from repeated exposure over a longer period.
Chronic toxicity Effects over long-term contact, for material that stays in the body.
Genotoxicity Whether the material damages genetic material.
Carcinogenicity Tumour-forming potential over the lifetime of the implant.
Hemocompatibility Interaction with blood — clotting, haemolysis, platelet response.
Implantation The local tissue response where the material actually sits.
Absorption profile For synthetic absorbables, clinical trials characterise how absorption and tensile strength change over time, so the profile on the datasheet is measured rather than assumed.

Inputs

Where the material comes from

A suture cannot be better than the yarn or monofilament it starts from, so sourcing is treated as a quality control rather than a purchasing decision.

Qualified vendors only — multinational yarn and monofilament producers in the USA, UK, Germany, Japan and Korea
Tested on arrival — biological safety endpoints cleared before a material enters production
USP & EP conformity — gauge, tensile strength and needle attachment checked per batch
Traceable to the box — batch records tie a finished pack back to its raw material lot
See our certificates →

Feedback from the operating room

Quality and reliability are of prime importance to us, and the last control is not one we run ourselves: we continuously evaluate our sutures and act on the feedback surgeons give us, which is how the range has changed over three decades.

If a batch does not behave as our own records say it should, we want to know. Write to — or ask your distributor to raise it with our exports team.

Ask us for the documentation

Distributors and hospitals can request certificates, technical files and test summaries for any product in the range.

Request documentation View certificates